Constantine III of Byzantium

Constantine III of Byzantium (3 May 612-26 May 641) was the Emperor of the Byzantine Empire from February to May 641, succeeding Heraclius and preceding Herakleonas of Byzantium.

Biography
Constantine was born on 3 May 612, the son of Emperor Heraclius and Fabia Eudokia. He was from the House of Herakleidon, a dynasty of Orthodox Christian Greeks. In 641, his father died and he became Emperor of the Byzantine Empire, and he was co-emperor with his younger brother Herakleonas of Byzantium. He died of tuberculosis four months after becoming emperor, and his general Valentinus spread rumors that Herakleonas killed Constantine so that he could have all of the power. Soon after, Herakleonas was deposed, leaving three Byzantine emperors dead in one year.